Hot-air furnace.



A. D. SMITH. HOT AIR FURNACE,A

APPLICATION FILED 001.9, I9I4.

Patented Dec. 5, 1916.

2 SHEETS-SHEET I.

gnam/WISO@ Ubin-Masa A. D. SMITH.

HOT AIR FURNACE.

APPLICATmN man ocT.9,1914.

Patented. Dec. 5,1916.

SHEET 2.

2 SHEETS Gianna? metete.

ANDREW n. sI/II'rII, or MARION, INDIANA.

Hor-nm rUnNacn.

Specification of Letters Patent.

ratenteu nee.. 5, raie..

Application filed October 9, 1914. Serial No. 865,875.

To all 'whom it may concern: 'p

Be it known that I, ANDREW D. SMITH, a citizen of the United States, residing at Marion, in the county of Grant and State of Indiana, have invented new and useful Improvements in Hot-Air Furnaces, of which the following is a specification.

This invention relates to heating furnacesand has particularv application to a hot air furnace.

The object of this invention is to provide a device of this character which is a combined heatingand Ventilating apparatus for houses, dwelling or the' llike, wherein the furnace is'provided with improved means for ejecting pure heated air intothe dwelling and for ejecting or withdrawing the bad air from the dwelling.

In the accompanying drawings: Figure 1 is partly an elevation and partly a sectional view of a furnace constructed in accordance with my invention and showing the same installed in a cellar and connected to a chimney or flue and provided with heating pipes which lead to an overhead apartment. Fig. 2 is a vertical central sectional view of the same. Fig. 3 is a front elevation of the same. Fig. 4 is a vertical transverse sectional view through the furnace -taken on theline P-4 of Fig. 1.

The furnace as here shown comprises a.

of the casing 5 being rounded and arranged in spaced relation to the re pot casing, the

said top coacting with the top wall 7 of the re pot casing to provide an air moistening chamber 8 extending the entire length of the casing, and with which between the ends of the casing communicate hot air distributing pipes 9 which communicate with apart ments in the building which receive heatedk air from the furnace. rlhe front end wall of the casing 5 is provided with the usual fuel door 10 and ash door l'in which is arranged a damper for regulating the draft` of air through the furnace.` rlFhe other end of the casing 5 coacts with a transversely extending partition 12 within they fire pot casing to provide va Asmoke chamber 13 from which sootand other matter maybe removed by means of a door 14 in one side wallof the casing 5.

eol

'A smoke pipe l5 1s arranged at the rear I end of the furnace and provided with branches'l, 17 and 18, each of whichis provided with a damper 19, the branch pipe 16 communicating with the air moistening chamber 8 near Athe top thereof, while the branch pipe 17 establishes communication with the smoke chamber 13 at its upper end v and in alinement with the passage for the products of combustion below the top 7 of the fire pot casing. The branch pipe 18 communicates with the lower end of the smoke passage 13.v

' The sidewalls of the casing 5 are held in spacedv relation with the sidewalls of the fire pot casing by means of vertically extending and spaced partitions 20 and 21.

`The partitions 21 which are arranged adja.

cent the front of the casing receive and supportthe convoluted heating pipes 22 arranged uponl opposite sides of the fire pot casing and between the same and the side walls of the casing 5. 4'llhe convolutions in the pipes 22 are arranged to extend longitudinally of the furnace, so that the upper ends of the pipes communicate with the air molstening chamber 8 near the rear end of the furnace, while the lower ends of the pipes 22 are connected with a branch pipe 23 located beneaththe front end of the fur'- nace and connected with -a cold air supply duct 24 in'which is arranged a damper 25 by means of which the amount of lair passing into the air heating pipes 22 may be regulated. f

1n order that the air entering the air chamber 8 fromthe pipes 22 may be moistened,

a water tank 26 is supported bythe top 7 of the fire pot casing at the forward end of said chamber, said tank having an open top and a..sup ply pipe 27 communicating therewith through the top 6 of thecasing 5 and provided with a valve. 28 by means of which the flow of water through the pipe 27 may be controlled. The water gage 29 is connected with the water tank 26 and' arranged upon the front of the furnace, so 'that the quantity 4of water within the tank 26 may be ascertained at all times.

can be advantageously treated by didusing Y As it has been found that certain diseases in heated air certain remedial agents, a funnel 29 is supported by of the casing 5 above the water tank 26, and through this funnel may be poured the agent with which it is desired to medicate the 'heated air, said funnel having a tightly fitting cap.

heat rising from the fuel will remain longer in contact with the top 7 of the fire pot casing, thus reducing the quantity of fuel used in the furnace to heat the air passing into the pipes 22 through the cold air supply' pipe 24 and branch pipe 23. When the air enters the chamber 8 from the pipes 22 it is sufliciently'heated to absorb vapor given off from the water tank 26, and it will be noted that by spacing the water tank from the upper ends of the pipes 22 heated air entering the chamber 8 is caused by the curved top 6 of the casing 5 and the superheated air in the spaces between the partitions 20 and 21 to freely circulate and intermingle with the vapor before the heated air enters the distributing pipes 9. When it is desired to ventilate the apartments with which the air heating pipes 9 are connected by means of the furnace, the damper 25 in the cold air supply pipe 24 is closed, and the damper 19 inthe branch pipe 16 open so that foul air within the apartments is drawn through the pipes 9 and escapes into the smoke flue 15 through the branch pi e 16. i v

t will be seen from the foregoing description that the water tank 26 rwhich contains the medicated water to be vaporized is located at the forward end of the furthe curved wall 6` nace and in advance of the air distributing pipes 9, and that the branch pipe 16 communicates with the air chamber 8 at the upper end of said chamber, so that as the foul air is being drawn through the pipes 9 and into the smoke pipe 15, the greater quantityv of the vapor rising from the tank 26 seeks the lower level in the chamber 8 and is prevented from being withdrawn with the foul air through the smoke Hue.

From the above statements, it will be at once apparent that a furnace has been provided which not only heats and meistens the air which is distributed to the apartments of the building in which the furnace is installed, but that foul air may be removed from said apartments by means of the furnace.

Having thus described my invention, I claim A furnace comprising a casing, an air chamber within the upper part of the casing, a smoke chamber within the lower part of the casing, a fire box within said casing and spaced from said air chamber and the rear wall of the smoke chamber, air pipes arranged upon opposite sides of the fire box and communicating with the air chamber at the rear end thereof, a smoke pipe in thc rear of said casing and having its lower end communicating with the lower portion of the smoke chamber in the rear of the fire box, ay branch pipe connecting said smoke pipe'with the upper portion of the smoke chamber, a second branch pipe connecting the air chamber with the smoke pipe, dampers arranged within each of the smoke pipes, and distributin pipes communicating with said air cham er.

In testimony whereof I afiix my signature in presence of two witnesses.

ANDREW D. SMITH. Witnesses LEO C. SMITH, GEORGE T. BRUNT. 

